9447 results about "Measurement device" patented technology

The invention provides a measuring device suitable for wire saw rock cutting drilling positioning and a control method, and relates to the field of rock cutting construction. The plane position of a drilling machine and three-dimensional space attitude data of a drilling rod are obtained in real time through a GNSS receiver module arranged on drilling machine equipment, and the angle and the position of the drilling rod are accurately controlled through real-time monitoring of a multi-sensor module; the data processing module verifies and analyzes the received data, transmits an analysis result to the deviation judgment module and calculates the deviation value of the data, meanwhile, the HMI control module facilitates an operator to monitor the equipment state in real time, and when the deviation judgment module confirms that the deviation of all the data is within a preset threshold value, the HMI control module sends the data to the data processing module. The HMI module indicates the drilling machine to start drilling operation; the method is suitable for various rock cutting and drilling tasks, particularly in the environment needing high-precision positioning and drilling control, the accuracy and reliability of data are improved, and therefore the drilling precision and stability are improved.

The invention belongs to the technical field of foundation bed leveling, and particularly relates to a gravel foundation bed leveling device and method suitable for a shallow water area. The gravel foundation bed leveling device comprises a leveling frame, a measuring device, an adjusting device and a scraper, the leveling frame comprises two longitudinal beams and a plurality of cross beams, and a leveling bin is formed between every two adjacent cross beams; the measuring device comprises four measuring rods detachably connected to the four corners of the leveling frame, and positioning equipment is installed at the top ends of the measuring rods. The adjusting device comprises four height adjusting screw rods and four screw sleeves, the four screw sleeves are arranged near the four measuring rods and fixedly connected into the leveling frame, and the height adjusting screw rods are connected into the screw sleeves in a one-to-one threaded mode and penetrate through the leveling frame; the two ends of the scraper in the length direction are detachably connected to the top faces of the cross beams on the two sides of the leveling bin in a pressed mode respectively. The novel leveling device is provided for manual leveling of the gravel foundation bed in the shallow water area, and the leveling precision of the gravel foundation bed in the shallow water area can be improved.

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

The invention relates to the technical field of curtain walls, and discloses a measuring device for processing a hyperbolic aluminum plate. Comprising a detection truss body used for providing a movable supporting structure; the laser detection instrument is mounted on the detection truss body and is used for performing three-dimensional scanning on the hyperbolic aluminum plate and generating point cloud data; the reference correction instrument is used for calibrating and detecting the reference position of the truss body; the control module is used for scanning a ground plane reference corresponding to the measuring device for machining through a reference correction instrument, and obtaining an X-axis deviation value and a Y-axis deviation value of the detection truss body and the ground plane reference and a Z-axis deviation value corresponding to the detection truss body; according to the X-axis deviation value, the Y-axis deviation value and the Z-axis deviation value, a reference correction instrument is controlled to calibrate and detect the reference position of the truss body; and controlling the laser detection instrument to walk according to a preset path, executing a scanning program to generate a three-dimensional format file, and performing fitting comparison on the three-dimensional format file and a design model corresponding to the hyperbolic aluminum plate to complete three-dimensional shape detection of the hyperbolic aluminum plate.

The invention relates to a multifunctional deformation measurement device and a measurement method, and belongs to the technical field of thermal deformation measurement. Manufacturing a multifunctional deformation measuring device; marking the test piece to be tested; calibrating the precision of the measurement system by using a reference standard substance; a temperature sensor is installed on the test platform; vacuumizing treatment is conducted through a vacuum system; temperature control is carried out through a temperature precise regulation and control module; forming a heat radiation boundary; adjusting the visual angle and focal length of the measuring camera; adjusting a monochromatic illumination light source to realize light coverage on the tested piece; spraying speckles on the test piece to be tested; measuring the initial state of the tested piece; temperature control is carried out through a temperature precise regulation and control module; testing and recording the deformation condition of the tested piece at each temperature point in the whole test process; the method can solve the problems that a measurement test piece is only limited to a material-grade sample, the measurement environment simulation application range is small, the measurement error is large and the like in a traditional method, and is used for guaranteeing high-precision measurement of thermal deformation of a large-size composite material structure of a spacecraft.

The invention relates to the field of measurement while drilling in drilling operation, in particular to a small-diameter resistivity while drilling measuring device which comprises a drill bit installed at the bottom of a drill rod, a main shaft rotationally arranged in the drill rod, hinged plates symmetrically arranged at the upper end of the drill rod, and an annular cavity formed in the drill rod. Annular frames with U-shaped sections are symmetrically arranged in the annular cavity in a sliding manner, a receiving end and a transmitting end are respectively mounted in the annular frames which correspond to each other up and down, and mounting units for limiting the transmitting end and the receiving end are arranged in the annular frames. The high-efficiency detection of measured objects with different depths and angles in a complex geological environment is realized, the vibration generated in the drilling process of the drill bit is effectively absorbed, the transmitting end and the receiving end are ensured to work in a stable environment, the measurement error caused by the vibration is avoided, and the detection precision and reliability are greatly improved.

In one embodiment, a method includes accessing magnetic data from a magnetic-measurement device. The magnetic data corresponds to one or more locations of the magnetic-measurement device. The method includes accessing geofencing data corresponding to an area; comparing the magnetic data with the geofencing data; based on the comparison, determining that the locations correspond to the area; and, based on the determination, authenticating the magnetic-measurement device for access to one or more resources.

The invention discloses a moisture flow measuring method based on vortex street frequency-disturbance wave frequency dual-mode detection, an adopted measuring device comprises an annular electrode pair, a pressure sensor, a temperature sensor and a vortex street flowmeter, and the annular electrode pair is used for obtaining a liquid film thickness sequence; the pressure sensor is used for collecting working condition pressure, the temperature sensor is used for collecting working condition temperature, and the vortex shedding flowmeter is used for collecting vortex shedding signals; the measurement method comprises the following steps: (1) establishing a moisture measurement model; (2) a Newton iteration format with the actual value of the gas phase flow in the moisture as a parameter is obtained; and (3) iteratively solving the gas volume flow.

A fluid transfer system component for internally measuring fluid density in real- time. The component may be a flange comprising a base having a first face and a second face, a primary fluid passageway extending through the base from the first face to the second face, a secondary fluid passageway extending through the base from the first face to the second face, and an outside wall, a portion of which is configured to operably engage with a measuring device and comprises a third opening. The primary fluid passageway may have a non-circular cross-section allowing the secondary fluid passageway to be parallel to the primary fluid passageway. The third opening may be in fluid communication with the secondary fluid passageway allowing the measurement device to measure fluid data such as fluid density via the secondary fluid passageway.

A surface shape measurement device includes: a first image capturing system configured to capture a first captured image of a measurement object while scanning relative to the measurement object; a second image capturing system that is separate from the first image capturing system and configured to capture a second captured image of the measurement object or a support body thereof in synchronization with the first image capturing system; a calculating unit configured to calculate a surface shape of the measurement object based on first captured images; a storage unit configured to store coordinate system transformation information for transforming a second coordinate system to a first coordinate system; a displacement detecting unit configured to detect displacement of the measurement object based on second captured images; and a correcting unit configured to correct the surface shape based on a detection result of the displacement and on the coordinate system transformation information.

The invention discloses a high-sensitivity miniaturized HOx free radical accurate measurement device and method, and relates to the technical field of atmospheric environment detection and automatic control, and the device is composed of a free radical generation and removal device, a light source module, longitudinal HOx double cavities, a gas distribution module and a collection and control system. The free radical generation and removal device can generate HOx free radicals or remove OH free radicals; the light source module can emit laser which enables OH free radicals to generate fluorescence and transmit the laser into the longitudinal HOx double-cavity; the longitudinal HOx double cavities are used for exciting OH free radicals to generate a large amount of fluorescence and collecting and converting the fluorescence into electric signals; the gas distribution module is used for injecting gas in the device and maintaining the flowing state of gas flow; and the control and acquisition system is used for controlling automatic operation and data acquisition and processing of the device. The device has the advantages of being high in detection sensitivity, small in size and capable of rapidly obtaining and removing OH free radical measurement interference, rapid calibration of similar concentration can be conducted on the actual HOx concentration in the actual measurement environment, accurate spectrum determination can be conducted on the laser wavelength, and therefore high-sensitivity accurate measurement of HOx free radicals is achieved.

Disclosed in the present invention are a wind field correction method and system applied to a single-station remote sensing device. The method comprises the following specific steps: S1, acquiring wind field data by means of a data information acquisition apparatus, and obtaining radial wind speed information of a current acquisition point by means of a data processing module; S2, on the basis of the hypothesis of an uniform wind field, using a classical wind speed reconstruction algorithm for inversion to obtain a three-dimensional wind speed vector of the acquisition point; S3, establishing an error model; and S4, on the basis of an error factor β calculated by means of the error model, performing data correction on the three-dimensional wind speed vector of the acquisition point obtained by means of inversion in S2. Compared with the prior art, the present invention provides a high-precision correction method, which can be operated on low-end hardware, and can also be directly installed and operated on hardware of a measurement device, so that measurement results can be corrected in real time, no additional complexity can be brought to users, and costs are reduced; and the present invention is suitable for solving complex system problems when accurate boundary conditions cannot be obtained.

The invention discloses a shallow hidden fire area radon gas in-situ tracing accurate identification and definition prevention and control system, belongs to the technical field of mine fire prevention and control, and aims to construct a dynamic monitoring, accurate delineation and targeted plugging multi-cooperation closed-loop governance chain and an in-situ radon detection and identification monitoring unit. Drilling, cup burying and sampling integrated operation is completed, and a radon gas concentration abnormal signal is monitored in real time; the radon measurement magnetic method fire area precise delineation unit is used for quantitatively delineating a fire source prevention and control area in a grading manner by fusing a radon gas magnetic field two-parameter ring type measurement network layout and combining an intersection and union set abnormal area division method and a comprehensive abnormal index threshold value method; according to the earth surface crack self-adaption blocking treatment unit, a dynamic shoveling solidified slurry precise blocking device is adopted, and efficient treatment of the shallow buried coal seam hidden fire area is achieved by separating an earth surface and an underground air leakage channel through bucket prepared soil screening and conveying, instant slurry preparation through a synthesis system, directional slurry spraying through a blocking mechanism and crawler belt ballasting dense blocking.

A multi-point synchronous automatic measurement system for lateral deformation of a foundation pit enclosure. The system comprises a pipeline (1), two or more measurement devices (2) and an acquisition and transmission device (3), wherein each measurement device (2) comprises a supporting frame, an inclined rod (23) and a sensor (24); the pipeline (1) is buried into a foundation pit enclosure structure (4), and the pipeline (1) has a rectangular cross-section; oppositely arranged engagement grooves (11) for fixing the supporting frame are provided in the pipeline (1), the engagement grooves (11) are axially arranged to extend along the entire length of the pipeline (1), and a bottom plate is provided at the bottom of the engagement groove (11); the supporting frame comprises four rod members, and adjacent rod members are connected by means of a rotation shaft (25) to form a rectangular structure; the two or more measurement devices (2) are sequentially arranged in the pipeline (1) from bottom to top; the inclined rod (23) is arranged on the diagonal of the supporting frame of each measurement device (2); the sensor (24) for measuring a change in length of the inclined rod (23) is arranged on the inclined rod (23); all the sensors (24) are connected to the acquisition and transmission device (3); and the acquisition and transmission device (3) sends measurement data from each sensor (24) to a cloud server. In this way, multi-point synchronous measurement of lateral deformation of the foundation pit enclosure structure (4) can be realized.

The invention discloses a method for measuring a detection inclination angle of a two-component atomic shearing interferometer. The method comprises the following steps: constructing an inclination angle set of an angle swinging device; when the atoms are acted by the pi Raman laser and the second pi / 2 Raman laser, the reflecting mirror rotates by an angle; alternately detecting multiple groups of odd-numbered groups and even-numbered groups; traversing all dip angles in the dip angle set; and fitting and calculating the actual included angle of the longitudinal direction of the imaging surface of the CCD camera relative to the Z-axis direction. The invention further discloses a measuring device for the detection inclination angle of the two-component atom shearing interferometer. According to the method, an existing atom shearing interferometer can accurately measure the inclination angle of a detection system of the atom shearing interferometer, so that the problems of noise and system errors caused by the fact that the inclination angle of the detection system of the atom shearing interferometer does not return to zero are solved, and drifting of differential measurement of the two-component atom interferometer caused by inclination angle changes is restrained.

The invention discloses a cylindrical inner wall surface defect automatic measuring device and an identification and evaluation method. The device comprises a measuring unit, a supporting platform, a motion platform, a lengthening shaft and a control system. The measuring unit comprises one or more groups of laser profile sensors, is carried at the tail end of the lengthened shaft and is used for measuring the morphology data of the surface of the inner wall of a measured workpiece, the measuring unit is connected with the motion platform through the lengthened shaft, and the supporting platform is a V-shaped supporting platform and is used for placing the measured workpiece; the motion platform comprises an X-axis linear motion platform, a Z-axis linear motion platform and a rotary shaft motion platform; the measuring unit can realize horizontal scanning measurement, rotary scanning measurement and adjustment of a measuring range through the motion of the motion platform; and the control system is used for performing closed-loop feedback control on the X-axis linear motion platform, the Z-axis linear motion platform and the rotating shaft motion platform. According to the invention, the surface defects of the cylindrical inner wall can be automatically measured, identified and evaluated with high precision and high efficiency.

A radar based, fill level measuring device for determining fill levels in containers, wherein the fill level measuring device can be applied for a large number of different applications, includes a signal production unit designed to produce a first transmitted radar signals within a first frequency band and supplementally a second transmitted radar signal within a second frequency band that does not overlap with the first frequency band and is clearly separated therefrom. The evaluation unit of the fill level measuring device can determine a first fill level value based on the first received signal. Based on the second received signal potentially another fill level value can be determined. In this way, the fill level measuring device can be adapted as regards frequency band to the particular application. The ascertained fill level can be checked for plausibility by comparing the fill level values ascertained in different frequency bands.

The invention discloses a transmission housing end face distance measuring device, which relates to the technical field of transmission production equipment and comprises a measuring device rack and a measuring device slidably mounted on the measuring device rack, and a housing base is arranged below the measuring device. The measuring device comprises a mounting frame, a measuring sensor is mounted in the mounting frame, a contact screw mounting plate is movably arranged in the mounting frame, and a contact screw is arranged at the position, corresponding to the measuring sensor, of the contact screw mounting plate. The lower end of the mounting frame is connected with a reference surface contact plate, the contact screw mounting plate is located on the upper side of the reference surface contact plate, the lower side of the contact screw mounting plate is fixedly connected with a third connecting column, and the third connecting column slidably penetrates through the reference surface contact plate and then is connected with a measuring surface contact plate. The device can accurately measure the distance between the two end faces of the transmission housing, is high in measurement precision, is high in measurement efficiency, is good in measurement reproducibility, and can effectively guarantee the service life of a transmission.

There is provided an inside-diameter measuring unit capable of automating inside-diameter measurement and a control method for automatic inside-diameter measurement. An inside-diameter measuring part is supported by a support frame part via a floating joint part. The floating joint part includes a rotation-allowing mechanism part and a translation-allowing mechanism part. A measuring head part of the inside-diameter measuring part is inserted into a hole by a robot arm part. The inside-diameter measuring part adjusts its position and posture autonomously by the reaction force when a contact point pushes against the inner wall of the hole to align the axis of the inside-diameter measuring part with the axis of the hole. An electric inside-diameter measuring unit can automatically measure the inside diameter of a hole.

The invention discloses a three-dimensional space velocity field measuring device and method suitable for a helicopter nozzle, and belongs to the technical field of aerodynamics test. The problems that in the prior art, a traditional three-dimensional velocity field measuring device and method are complex in arrangement and low in calculation efficiency are solved. A scanning type measuring device is built, a laser plane is calibrated, internal and external parameters of a double-exposure camera are calibrated, a checkerboard calibration plate is used for building a standard space plane grid, and a high-precision translation table is controlled by a computer to move to a designated position. Triggering each component through a digital pulse signal generator and synchronously controlling the two double-exposure cameras to collect particle images when the spray pipe sprays flow; and a three-dimensional velocity field based on the particle image is determined, and a three-dimensional space velocity field of jet flow of the jet pipe is obtained. According to the invention, high-precision and high-resolution velocity field data are effectively provided, accurate measurement of the three-dimensional velocity field of the helicopter nozzle is realized, and the method can be applied to measurement of the three-dimensional velocity field of the helicopter nozzle.

The utility model discloses a deep ring inner diameter precision measuring device which comprises a fixed rod, a movable rod and a check gauge, the fixed rod and the movable rod are connected through a rotating shaft to form an equal armed lever mechanism, the left end of the fixed rod is provided with a measuring head, and the right end of the fixed rod is provided with a dial indicator through a meter fixing handle; the left end of the movable rod is provided with a measuring head, the right end of the movable rod is in contact with the head of the dial indicator, a tension spring is arranged between the fixed rod and the movable rod, and the check gauge is a special standard comparison ring for checking the zero position. According to the utility model, precise measurement of the inner diameter of the deep inner ring can be effectively implemented, and the problem that a general inner hole measuring device cannot avoid interference of an external small hole to detect an inner ring groove is simply, conveniently and economically solved.

The invention discloses a photoelectric pod image stabilization and flyback integrated measuring device and method, and relates to the technical field of aircraft photoelectric pods. Comprising the following steps: acquiring a rotation angle of a photoelectric pod in a working state within a time interval, and calculating a rotation angular velocity of the photoelectric pod within the time interval; and an active stability control model is established, and when the rotation angular speed of the photoelectric pod within the time interval is smaller than a set value, the position of the optical axis of the binocular camera is adjusted through an inertia original element of the photoelectric pod so as to capture a target object. According to the method, the active stability control model is established, multiple time intervals are divided, synchronous frequency rotation is carried out on the binocular camera in the opposite direction while the aircraft or the photoelectric pod rotates, it is ensured that the target object can be captured by the binocular camera in each time interval, and the purpose of rapidly capturing the target object is achieved; the tracking precision of the aircraft is improved, and the aircraft can effectively track the target.

The invention relates to the technical field of laser transmission characteristic testing, in particular to a medium-wave infrared laser long-distance transmission attenuation characteristic external field testing method and device. The method is an indirect measurement method, a diffuse reflection plate is set up at a designated position of a transmission path, laser reaching the diffuse reflection plate is quantitatively measured through a detector, in combination with a bidirectional reflection distribution function of the diffuse reflection plate, the target reaching power of the laser transmitted through the long-distance atmosphere is obtained, and the target reaching power is calculated by comparing the target reaching power with the laser output power of a transmitting end. The laser long-distance transmission power attenuation characteristic can be obtained, and the problems that in current laser atmospheric transmission attenuation characteristic measurement, a laser radar does not have a medium-wave infrared measurement method, and the power of a specified position of a transmission path cannot be directly received and measured through a detector due to the fact that the size of a light spot is too large after long-distance transmission in direct measurement are solved. The measuring device is simple in structure and can support indirect measurement to obtain the long-distance transmission power attenuation characteristics of the medium-wave infrared laser.

To solve conventional problems, that is, to provide a bridge displacement monitoring system capable of continuously measuring a displacement of a bridge member and determining whether or not the displacement amount is appropriate after subtracting a displacement due to a temperature.SOLUTION: A bridge displacement monitoring system according to the present invention is a system for monitoring the displacement of a bridge, and includes temperature measurement means, positioning means, observation point displacement calculation means, smooth displacement calculation means, temperature-based displacement generation means, correlation value calculation means, processing method selection means, temperature displacement calculation means, displacement difference calculation means, and first warning output means. The smooth displacement calculation means performs two or more types of noise processing on the observation point displacement to obtain two or more types of "smooth displacements", and the temperature-based displacement generation means generates two or more types of "temperature-based displacement data sets" based on the "time-based temperature data set" and the two or more types of "time-based displacement data sets".SELECTED DRAWING: Figure 2

The invention relates to the technical field of laser measurement structure deformation, in particular to a structure deformation monitoring method and device based on laser measurement equipment. The method comprises the steps of obtaining a data deviation degree of a monitoring point in a target period; according to the difference between the correlation degree and the data deviation degree of distance data of each monitoring point and other monitoring points in the target period, obtaining a deformation ratio coefficient of each monitoring point in the target period; filtering the distance data of the monitoring point in the target period in combination with the data deviation degree and the deformation proportion coefficient to obtain a filtering comprehensive distance of the monitoring point in the target period, constructing a three-dimensional model of the structure by using the filtering comprehensive distance, and monitoring the deformation of the structure according to the difference between the three-dimensional model of the structure in the target period and the previous monitoring period. According to the method, the distance data is filtered in consideration of the noise influence degree on the distance data acquired by the laser measurement equipment, so that the accuracy of the three-dimensional model of the structure is improved, and the accuracy of monitoring the deformation of the structure is improved.

The invention belongs to the technical field of water quality monitoring, and discloses a reclaimed water reuse landscape water quality change monitoring method and system, and the method comprises the steps: obtaining original measurement data of a target index in a water body and a plurality of environment background parameters representing a water body environment background; analyzing and calculating a dynamic influence relationship between the original measurement data of the target index and each environment background parameter to obtain a state parameter representing a measurement deviation state of the target measurement device; determining a correction value corresponding to the current environment background and the measurement deviation state of the target measurement device by using a pre-established knowledge base according to the plurality of environment background parameters and the state parameters; correcting the original measurement data of the target index by using the correction value to obtain the corrected measurement data of the target index for evaluating the long-term influence of the reclaimed water on the aquatic ecological environment; an evaluation result is sent to a remote monitoring center; therefore, accurate measurement data can be provided, and reliable long-term influence evaluation is realized.

The invention discloses a mounting and measuring device for a water distribution ring pipe of an impulse turbine, which relates to the technical field of water turbines and comprises a measuring mechanism and a measuring and positioning plate. The measuring mechanism comprises a base with a horizontal adjusting mechanism; a supporting column is mounted on the base; a measuring arm is rotationally connected to the supporting column, and the rotating axis of the measuring arm is collinear with the center line of the unit. A positioning assembly and a first adjusting mechanism which are matched with the centers of a plurality of outlet flanges are arranged between the measuring arm and the supporting column; the central line elevation of the measuring arm is equal to the elevation of the water diversion blade of the bucket through the first adjusting mechanism; the mounting position of the outlet flange on each water distribution ring pipe joint is positioned through a positioning assembly; the measurement positioning plate is mounted on the outlet flange, and the measurement positioning plate is parallel to the measurement plate when the water distribution ring pipe is mounted; the measuring plate can adjust the elevation so as to eliminate errors caused by deformation of the long arm. The problem that the water distribution ring pipe is inconvenient to mount and measure due to the size and the weight of the impulse turbine can be solved.

A fish tape measurement device is disclosed. The fish tape measurement device comprises a body component that encases a spool of wire. The wire on the spool is a narrow, flat wire which comprises a plurality of measuring units marked throughout. The wire on the spool can wind in and out from approximately 100 to 200 feet. Thus, the markings will provide electricians with an exact length measurement in order to prevent cable and wire waste when working on a jobsite.

The invention belongs to the technical field of precision testing, and particularly relates to an involute sample plate measuring device with a special-shaped repairable measuring head and a measuring method. Two symmetrical wedge-shaped surfaces are arranged on the special-shaped repairable measuring head; a repairable cylindrical surface knife edge is arranged at the intersection of the two wedge-shaped surfaces, and a chamfer is arranged above the cylindrical surface knife edge. According to the involute sample plate measuring device with the special-shaped repairable measuring head, the accurate measuring position of the special-shaped repairable measuring head is adjusted by adjusting the perpendicularity of a measuring bus formed by the contact of the cylindrical surface knife edge and the calibration plane of the perpendicularity calibration block and the working surface of the generating guide rail, so that the measurement of the involute sample plate is carried out. The measuring head of the measuring device is easy to install, the height of the measuring head does not need to be accurately adjusted, the measuring head is not sensitive to the installing position, the measuring head can be repaired, and the precision of measuring the tooth profile deviation of the involute template is high.

The disclosure discloses an OAM measurement device independent quantum key distribution system based on real-time tracking compensation and method thereof, which comprises a user side Alice, a user side Bob and a measuring unit; the user side Alice and the user side Bob realize real-time monitoring and phase distortion compensation of the channel environment by using strong pulse lasers from the measuring unit; the measuring unit utilizes an M-Z interferometer formed by a Dove prism to realize the separation of odd / even orbital angular momentum order photons, and measure Bell states of the photons with orbital angular momentum; the disclosure realizes OAM measurement device independent quantum key distribution system based on real-time tracking compensation, and the user uses the orbital angular momentum state for coding, thereby having the characteristics of good stability, high code rate and strong expansibility.